Task 1:

#include<iostream>

using namespace std;

int main()

cout<<"the size of int is "<<sizeof(int)<<endl;

cout<<"the size of float is "<<sizeof(float)<<endl;

cout<<"the size of double is "<<sizeof(double)<<endl;

cout<<"the size of char is "<<sizeof(char)<<endl;

cout<<"the size of string is "<<sizeof(string)<<endl;

cout<<"the size of long double is "<<sizeof(long double)<<endl;

cout<<"the size of long Int is "<<sizeof (long int)<<endl;

return 0;

}
Task 2:

#include<iostream>

using namespace std;

int main()

int A[4];

float B[6];

char C[8];

double D[9];

string S[2];

long double L[7];

long int I[2];

cout<<"the size of int is "<<sizeof(A)<<endl;

cout<<"the size of float is "<<sizeof(B)<<endl;

cout<<"the size of double is "<<sizeof(D)<<endl;

cout<<"the size of char is "<<sizeof(C)<<endl;

cout<<"the size of string is "<<sizeof(S)<<endl;

cout<<"the size of long double is "<<sizeof(L)<<endl;

cout<<"the size of long Int is "<<sizeof (I)<<endl;

return 0;

}
Task 3:

#include<iostream>

#include<cstring>

using namespace std;

int main()

char A[100],B[100];

cout<<"Enter first string "<<endl;

cin.getline(A,100);

cout<<"Enter second string "<<endl;

cin.getline(B,100);

cout<<"the strings after entered in a character variable are "<<A<<endl;

cout<<"the strings after entered in a character variable are "<<B<<endl;

return 0;
}

Task 4:

#include<iostream>

#include<cstring>

using namespace std;

int main()

char ch[20],ch1[20];

int count=0,count1=0;

cout<<"Enter first string "<<endl;

cin.getline(ch,20);

cout<<"Enter second string "<<endl;

cin.getline(ch1,20);

cout<<"first string "<<ch<<endl;

cout<<"first string "<<ch1<<endl;

int b=strlen(ch1);

cout<<c<<endl;

cout<<b<<endl;

if(b>c)

cout<<"the string with more character is second with "<<b<<"characters"<<endl;

else

cout<<"The string with more character is first with "<<c<<"characters"<<endl;

for(int i =0;i<=c;i++)

if(ch[i]=='A'||ch[i]=='E'||ch[i]=='I'||ch[i]=='O'||ch[i]=='U'||ch[i]=='a'||ch[i]=='e'||ch[i]=='i'||ch[
i]=='o'||ch[i]=='u')

count++;

for(int i =0;i<=b;i++)

if(ch1[i]=='A'||ch1[i]=='E'||ch1[i]=='I'||ch1[i]=='O'||ch1[i]=='U'||ch1[i]=='a'||ch1[i]=='e'||ch1[i
]=='i'||ch1[i]=='o'||ch1[i]=='u')

count1++;

cout<<"the vowels in first string are with "<<count<<endl;

cout<<"the vowels in second string are with "<<count1<<endl;

Task 5:

#include<iostream>

#include<cstring>

using namespace std;

int main()

char str_1[20],str_2[20];

cout<<"Enter first string "<<endl;

strcpy(str_2,str_1);

cout<<"First string is "<<str_1<<endl;

cout<<"Second string is copied "<<str_2<<endl;

return 0;

Task 6:

#include<iostream>

#include<cstring>

using namespace std;

int main()

char str_1[20],str_2[5];

cout<<"Enter first string "<<endl;

cin.getline(str_1,20);
 strncpy(str_2,str_1,sizeof(str_2)-1);

cout<<"First string is "<<str_1<<endl;

cout<<"Second string is copied "<<str_2<<endl;

cout<<"size of string 2 is "<<sizeof(str_2)<<endl;

return 0;

Task 7:

#include<iostream>

#include<cstring>

using namespace std;

int main()

char str_1[20],str_2[5];

cout<<"Enter first string "<<endl;

cout<<"Enter second string "<<endl;

cin.getline(str_2,20);

cout<<"the first string is "<<str_1<<endl;

cout<<"the second string is "<<str_2<<endl;

strcat(str_1,str_2);

cout<<"the concatinated string is "<<str_1<<endl;

return 0;

Task 8:

#include<iostream>

#include<cstring>

using namespace std;

int main()
{

char str_1[20];

cout<<"Enter first string "<<endl;

cin.getline(str_1,20);

strlwr(str_1);

cout<<"THE STRING 1 IN LOWER CASE LETTER ARE \n" <<str_1<<endl;

strupr(str_1);

cout<<"THE STRING 1 IN upper CASE LETTER ARE \n" <<str_1<<endl;

return 0;

}
Task 9:

#include <iostream>

using namespace std;

int main()

int mat[3][3],upmat[3][3];

for (int i=0; i<3;i++)

for(int j=0;j<3;j++)

cout<<"Enter a number for matrix \n"<<endl;

cin>>mat[i][j];

for (int i=0; i<3;i++)

for(int j=0;j<3;j++)

cout<<mat[i][j]<<"\t";

cout<<endl;

cout<<"The reversed matrix with respect to row is "<<endl;

for (int i=0,a=0; i<3,a<3;i++,a++)

for(int j=2,b=0;j>=0,b<3;j--,b++)

{
 cout<<mat[i][j]<<"\t";

upmat[a][b]=mat[i][j];

cout<<endl;

cout<<"The reversed matrix with respect to column is "<<endl;

for (int i=2; i>=0;i--)

for(int j=0;j<3;j++)

cout<<upmat[i][j]<<"\t";

cout<<endl;

return 0;

}
Task 10:

#include <iostream>

using namespace std;

int main()

char names[10][20];

for (int i=0; i<10;i++)

cout<<"Enter name of student number "<<i<<endl;

cin.getline(names[i],20);

for (int i=0; i<10;i++)

if(names[i][0]=='A'||names[i][0]=='a'||i%2!=0)

cout<<names[i];

cout<<endl;

return 0;